Scale and Scale Drawings Circumference and Area of Circles

If the radius of a circle is 12.5 meters, the diameter is ____

• 6.25 meters
• 125 meters
• 25 meters
• 50 meters

A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference?

• c = π15

• C = 2π15

• c = 15 ÷ π

• c = 15 π²

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area?

• 31.25 m²
• 29.55 m²
• 30.36 m²
• 28.27 m²

A circular pie has an area of 706.5 cm². What is the radius of the pie?

• 225 cm
• 30 cm
• 15 cm
• 112.5 cm

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft
• 12.25 ft
• 10.99 ft
• 8.75 ft

A circle pool has a radius of 7.5 ft. Monica wants to know how many ft of a pool cover she needs to buy?

• 23.55 ft²
• 176.63 ft²
• 47.1 ft²
• 706.5 ft²

The stained glass window is a semicircle. What is the perimeter of the window?

• 40.82 inches

• 66.84 inches

• 81.64 inches

• 107.64 inches

What is the area of this circle?

• 1256.64 sq. in.

• 31.41 sq. in.

• 314.16 sq. in.

• 123.12 sq. in.

A city is designing a new garden. A scale drawing of the garden is shown below. What is the circumference of the garden?

• 628 feet

• 200 feet

• 100 feet

• 542 feet

A large pizza has a diameter of 14 inches. A medium pizza has a diameter of 10 inches. How much larger is the area of the large pizza than the area of the medium pizza?

Round your answer to the nearest hundredth of an inch.

Use 3.14 for 𝜋.

• 50.24 in²

• 75.40 in²

• 78.50 in²

• 153.86 in²